[djur]

I really liked the Wii U pad and used it a lot. The Switch is a more fully realized version of the concept, but it has its downsides -- it's not as comfortable to hold and play for long periods, and the lack of a two-screen mode makes certain concepts less effective. Mario Maker, for instance, worked perfectly with the Wii U and feels compromised on the Switch in comparison.

The battery life was completely irrelevant to me. I just kept it plugged in.

[ThatPlayer]

Another example of the two-screen mode I liked was asymmetrical local multiplayer like Nintendo Land. It's not that it's impossible now, with two switches, but I haven't seen any games do it (with 4 players on a single switch, and 1 on the other).

[morelisp]

The Wii U's model doesn't really open up that many interesting asymmetrical multiplayer game designs, compared to multiple individual devices. There's a psychological effect of everyone being in the "same space" when most people are on one screen, but mechanically most of the time you'll want the opposite of what the Wii U can do - one person can see everything but everyone else can only see some limited view (c.f. Pac-Man Vs).

With individual devices, you can make a game where N people see something different, or N-1 people see the same thing and 1 sees something different, or where N people see the same thing (and maybe also something different, c.f. the Four Swords GBAs+GC model).

With the Wii U, you can make a game where everyone sees the same thing, or N-1 people see the same thing and 1 person sees that and something else. Even if you try to make the 1 person see something disjoint, it's too easy to cheat. And if you try to make everyone but one person see their own thing - too bad.

I always wondered why they never built something to render simple (or even complex, it can't be that costly) scenes out to multiple connected (3)DSs - relatively everyone with a Wii U must have had at least one...

[comex]

Smash Bros. for Wii U let you use a 3DS as a controller. It was awkward - you had to download the “Smash Controller” app onto the 3DS from the eShop - and didn’t have any kind of video streaming, but the connectivity was there at least.

[frosted-flakes]

Zelda Wind Waker was also great. You could assign weapons or items to the buttons whilr you were walking, or scroll through the map.

[GloriousKoji]

Breath of the Wild development started on the WiiU and I'm convinced it would have been better if they didn't have to shoe-horn in Switch support. The inventory menu of BOTW is horrible and totally was meant to be used real time on the gamepad.

[andrekandre]

i was surprised by that too

especially since the switch has a touchscreen, why is the inventory screen not using it?